YITH WooCommerce Wishlist < 4.10.1 - Unauthenticated Wishlist Rename via IDOR

Description

The plugin is vulnerable to Insecure Direct Object Reference via the REST API endpoint and AJAX handler due to missing validation on user-controlled keys. This makes it possible for unauthenticated attackers to discover any user's wishlist token ID, and subsequently rename the victim's wishlist without authorization (integrity impact). This can be exploited to target multi-user stores for defacement, social engineering attacks, mass tampering, and profiling at scale.